Full metal hard kick gas blowback KR9 with 4 non leaky magazines. RA TECH 6.01 tightbore inner barrel and RA TECH hop up assembly/ bucking. Suppressor covers inner barrel as I got an extended length barrel for increased accuracy. Works great no issues very fun. Great condition only bought a few months ago brand new. Can come with attachments if wanted. Want to swap for WE m4 sol/ 416 GBB or WE/Knights armament PDW GBB with extra mags/ part cash to match the worth of this rifle. Cash is king!! All in all rifle is worth 700$ I'm letting it go for cheap because I'm looking into something different! Make me some offers the worst I can say is no thanks